Primary Arms Holosun HE509-RD Enclosed Solar Powered Red Dot Reflex Sight ACSS Vulcan Reticle Black. Many of us spend plenty of time at the range attempting to achieve better shot placement. While three dot iron sights are pretty good the Holosun HE509 Powered Red Dot sight with ACSS Vulcan reticle is almost guaranteed to help you improve your accuracy. This pistol sized Primary Arms Red Dot Sight straightaway allows for a large field of sight and has those features which allow you to sight in quickly and acquire the target and the location you intend to hit. What's so neat about these Holosun HE509 Red Dot Sights is that the entire sight system is fully enclosed in light and rugged aluminum. Built to provide enhanced environmental protection and abrasion and shock protection the HE509 Red Dot Sight protective housing stands head and shoulders above an open form reflex form factor. Notes: The adapter plate for the ''-R'' version is compatible with the most popular aftermarket slide cut in the industry. It is the same footprint as the Holosun 507C making it compatible with most plate systems found on factory optics ready guns like the Walther PDP S&W M&P C.O.R.E. CZ Optics Ready Agency Arms AOS FN 509 MRD and Springfield Armory XDM Elite series handguns. It is also one of the most common aftermarket slide cut footprints. The included 509 adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces. The 509 ACSS model does not share the same footprint as the 509T (non-ACSS models) and therefore is incompatible with aftermarket mounting solutions and custom cut slides for the 509T (non-ACSS models). Specifications for Primary Arms Holosun HE509-RD Enclosed Solar Powered Red Dot Reflex Sight: Manufacturer: Primary Arms Color: Black Finish: Hardcoat Anodized Fabric/Material: 7075-T6 Aluminum Magnification: 1 x Objective Lens Diameter: 0.66 - 0.9 in Reticle: ACSS Vulcan Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 1 MOA Battery Type: Stand Alone Lithium Battery Quantity: 1 Water Resistance Level: Waterproof Shockproof: Yes Fogproof: Yes Gun Make: AR Platform Weight: 1.7 oz Condition: New Package Type: Box Magnification Type: Fixed Lens Finish: Multi-Coated Quantity: 1 Red Dot Sights-Footprint: Not Applicable Attachment Type: Slide Features of Primary Arms Holosun HE509-RD Enclosed Solar Powered Red Dot Reflex Sight Objective Lens: 17x23 Reticle: ACSS VULCAN Illuminated: Red Eye Relief: Unlimited Color: Color: Finish/Material: Aluminum Standard / 507c Adapter Plate Reticle: ACSS Vulcan Illumination Type: LED Illumination Color: Red Brightness Settings: 12 Eye Relief: Unlimited Length: 1.78 Width: 1.22 Height: 1.14 Weight: 2 Oz Package Contents: Primary Arms Holosun HE509-RD Enclosed Solar Powered Red Dot Reflex Sight Holosun HE509-RD-ACSS-R: HE509-RD Enclosed Solar Powered Red Dot Reflex Sight ACSS Vulcan Reticle Black